Straight upper and lower knives
For replacement sets where the blade length, section, holes and edge condition are confirmed against the shear and old part.
Sheet Metal Cutting Components
Guillotine Shear Blades for Sheet Metal Cutting
Straight upper and lower blades for guillotine and swing-beam shears. Reference configurations cover QC12Y/K and Q11 machine families, with custom production based on the old blade, drawing and cutting duty.
Upper and lower bladesQC12Y/K and Q11 referencesDrawing-based custom fitment
Machine model names and source-listed sizes are starting points only. Final length, width, thickness, holes, spacing, edge direction and matched quantity must be checked before production.
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What these shear blades do
Guillotine shear blades are installed in the upper and lower cutting positions of a plate-shearing machine. The blade pair works with a controlled gap and cutting geometry to separate sheet, plate or strip.
Product familyGuillotine shear blades
Blade rolesUpper, lower or matched set
Reference machinesQC12Y/K and Q11 families
Supply routeReference size or custom drawing
Matched cutting geometry
For swing-beam arrangements where the upper profile, lower seat and working clearance must be checked together.
Not press-brake tooling
These are cutting blades for sheet-metal shearing. They are not the punches and dies used to bend sheet on a press brake.
Upper blade, lower blade and matched set
The same machine may use several pieces with different positions and quantities. Confirm the role before comparing a size from a catalogue.
Upper shear blade
Confirm the mounting face, cutting direction, hole layout, effective edge and any profile shown in the approved drawing.
Lower shear blade
Confirm the lower seat, support surface, hole pattern, thickness and the relationship with the upper blade.
Matched upper and lower set
When both positions are replaced, record the piece count and keep the approved upper/lower configuration together.
Some source drawings show different upper profiles for swing-beam and gate-style configurations. This is a drawing-specific reference, not a universal rule for every machine.
Reference machine configurations and blade sizes
The table transcribes the supplied reference list. Blade dimensions are length × width × thickness in millimetres; listed quantity means the source-stated quantity per set, not a single-piece order quantity.
| Machine model reference | Blade size (mm) | Listed quantity | Reference note |
|---|---|---|---|
| QC12Y-4 × 2500 | 1300 × 63 × 16 | 4 pcs/set | Reference configuration; confirm blade position and hole layout. |
| QC12Y-4 × 3200 | 1100 × 63 × 16 | 6 pcs/set | Reference configuration; confirm against old blade. |
| QC12Y-4 × 4000 | 1025 × 63 × 16 | 8 pcs/set | Reference configuration; confirm effective cutting length. |
| QC12Y-6 (8) × 2500 | 1300 × 80 × 20 | 4 pcs/set | Source brackets retained; do not infer a universal thickness class. |
| QC12Y-6 (8) × 3200 | 1100 × 80 × 20 | 6 pcs/set | Source brackets retained; confirm the exact machine variant. |
| QC12Y-6 (8) × 4000 | 1025 × 80 × 20 | 8 pcs/set | Reference configuration; confirm hole spacing and edge. |
| QC12Y-10 (12, 16) × 2500 | 1300 × 100 × 25 | 4 pcs/set | Source brackets retained; confirm exact model and duty. |
| QC12Y-10 (12, 16) × 3200 | 1100 × 100 × 25 | 6 pcs/set | Reference configuration; drawing required before production. |
| QC12Y-10 (12, 16) × 4000 | 1025 × 100 × 25 | 8 pcs/set | Reference configuration; confirm effective edge and seat. |
| QC12Y-20 (25) × 2500 | 1300 × 120 × 32 | 4 pcs/set | Source brackets retained; confirm exact model variant. |
| QC12Y-20 (25) × 3200 | 1100 × 120 × 32 | 6 pcs/set | Reference configuration; confirm hole pattern. |
| QC12Y-20 (25) × 4000 | 1025 × 120 × 32 | 8 pcs/set | Reference configuration; confirm upper/lower role. |
| Q11-3 × 1300 | 1245 × 80 × 25 | 2 pcs/set | Reference configuration; confirm the source drawing. |
| Q11-3 × 1500 | 1545 × 80 × 25 | 2 pcs/set | Source-listed length is unusual for this model label; confirm before quotation. |
| Q11-2.5 × 1600 | 540 × 70 × 22 | 6 pcs/set | Reference configuration; confirm piece arrangement. |
| Q11-(13) 16 × 2500 | 508 × 80 × 25 | 10 pcs/set | Source model notation is ambiguous; drawing or old blade required. |
| Q11-4 × 2500 | 1270 × 70 × 22 | 4 pcs/set | Source row A; do not merge with the separate Q11-4 × 2500 row. |
| Q11-4 × 2000 | 508 × 70 × 22 | 8 pcs/set | Reference configuration; confirm whether this is an upper/lower set. |
| Q11-4 × 2500 | 508 × 80 × 25 | 10 pcs/set | Source row B; separate reference from the 1270 × 70 × 22 row. |
| Q11-6.3 × 2000 | 505 × 70 × 22 | 8 pcs/set | Reference configuration; confirm hole layout and position. |
Reference boundary: These rows are supplied starting points, not universal interchangeable sizes. Confirm machine model, blade position, length, width, thickness, hole diameter, centre spacing, cutting direction and effective clearance against an approved drawing or sample.
Guillotine shear blade drawing references
These original drawing sections show representative machine configurations, blade sections, hole spacing and upper/lower set quantities. The figures support review; the approved machine drawing or old blade remains the final fitment reference.
Legacy standard type 4 × 2500
Drawing fields: 508 mm overall layout, 127 mm hole-centre spacing, 70 × 22 mm section reference. Set: 5 upper blades + 5 lower blades, 10 pieces per set. Swing-beam and gate-type upper profiles are shown as separate reference details.
QC12Y(K) 4 × 2500 and Q11 4 × 2500
Machine references: QC12Y(K) swing type and Q11 gate type. Drawing fields: 1300 mm layout, 200 mm hole-centre spacing, 63 × 16 mm section reference. Set: 2 upper blades + 2 lower blades, 4 pieces per set.
QC12Y(K) 16 × 3200 and Q11 16 × 3200
Machine references: QC12Y(K) swing type and Q11 gate type. Drawing fields: 1100 mm layout, 200 mm hole-centre spacing, 100 × 25 mm section reference. Set: 3 upper blades + 3 lower blades, 6 pieces per set.
QC12Y(K) 16 × 4000 and Q11 16 × 4000
Machine references: QC12Y(K) swing type and Q11 gate type. Drawing fields: 1025 mm layout, 185 mm hole-centre spacing, 100 × 25 mm section reference. Set: 4 upper blades + 4 lower blades, 8 pieces per set.
Reference boundary: The dimensions and quantities shown here belong to the supplied drawing references. They are not universal interchangeable sizes. Confirm the exact machine variant, blade position, effective length, holes, edge profile and clearance before production.
Material selection follows the cutting duty
The source material lists several steel families. They are alternatives to review, not interchangeable grades or a single universal specification.
| Material direction | Source-listed examples | Source-described direction | What to confirm |
|---|---|---|---|
| Carbon tool steel | 65 / 75 carbon steel, T8, T10 | General mild-steel sheet and ordinary scrap shearing direction; source image shows HRC 57–59 as a reference. | Actual grade, heat treatment, plate thickness and inspection requirement. |
| Low-alloy tool steel | 6CrW2Si, Cr5Mo1V, 9CrSi, Cr12MoV | Stainless, hot-rolled and medium/thick sheet shearing direction in the source material; source image shows HRC 58–62 as a reference. | Material being cut, impact duty, edge geometry and confirmed hardness. |
| Alloy / hot-work direction | 4Cr5MoSiV1 (H13K), 7Cr7Mo2V2Si9 (LD), W6Mo5Cr4V2 (6542), H13 | Hot shear, hot-rolled steel billet or hot-shearing applications in the source description. | Cutting temperature, duty cycle, cooling and final grade selection. |
Cr12MoV appears in the supplied product title, but the title alone does not prove that every listed configuration uses Cr12MoV. The final material and hardness belong in the approved quotation or drawing.
Product detail checkpoints
These four checkpoints turn the supplied product-detail material into practical information for blade review and quotation.
Material and edge review
Qualified raw material is one input to the final blade specification. Confirm the steel grade, edge geometry and cutting duty before production.
Heat treatment and rigidity
Quenching and tempering should follow the selected grade and the required balance of hardness, toughness and section stability.
Hardness inspection
Record the target hardness range, inspection method and result against the approved material and quotation instead of assuming one value for every blade.
Packing and order scope
Confirm matched-set quantity, edge protection, identification and delivery requirements. Small-order requests can be reviewed case by case.
Confirm the machine before choosing the blade
A model name or visual match is only a starting point. These details control whether a replacement can be produced correctly.
01
Machine identity
Brand, model, cutting length, machine type and nameplate photo.
02
Blade position
Upper blade, lower blade or complete matched set.
03
Finished dimensions
Length, width, thickness, effective edge and profile details.
04
Hole layout
Hole count, diameter, countersink, centre spacing and end margins.
05
Cutting duty
Material grade, plate thickness, temperature and cutting frequency.
06
Order scope
Piece count per set, destination, delivery timing and inspection needs.
From material selection to inspected blades
A typical production route is shown below. The exact process and inspection scope follow the approved material, drawing and quotation.
Material Selection
Review the steel family against the material being cut, temperature and cutting duty.
Forging or Blank Preparation
Prepare the blade blank with suitable allowance for the confirmed finished dimensions.
Rough Machining
Establish the blade profile, faces and preliminary hole or mounting features.
Quenching
Apply the specified heat-treatment route for the approved material and duty.
Tempering
Stabilize the blade according to the selected grade and required balance of hardness and toughness.
Fine Grinding
Finish faces, thickness, flatness and cutting geometry against the approved reference.
Inspection
Check dimensions, holes, edge condition and matched quantity before packing.
Protective Packing
Protect the cutting edge and identify the machine reference and set configuration for dispatch.
This is a typical workflow reference. Do not treat it as a promise that every order uses the same heat treatment, equipment or inspection sequence.
Custom production from a drawing or sample
Non-standard length, thickness, hole layout and upper/lower profiles can be reviewed when the reference is complete.
Send the reference
Share the machine model, old blade, drawing or measured photos.
Check fitment
Separate machine dimensions from single-blade dimensions and confirm the blade position.
Approve the quote
Record material, hardness, quantity, inspection scope and any drawing revision.
Produce to approval
Use the approved reference for machining, inspection, identification and packing.
Guillotine shear blade questions
Short answers for replacement and custom-supply buyers.
Are guillotine shear blades used on a press brake?
No. Guillotine shear blades cut sheet or plate. A press brake uses punches and dies to bend sheet. Confirm the machine type before requesting a blade.
Are the QC12Y/K and Q11 sizes universal?
No. They are source-listed reference configurations. The same model label may have different blade sections, hole layouts or set quantities, so confirm from the drawing or old blade.
What is the difference between an upper and lower blade?
They occupy different positions in the cutting assembly and may have different profiles, mounting details and quantities. They should be specified separately unless a complete matched set is requested.
Which material should be selected?
Material depends on the sheet or plate being cut, thickness, temperature, impact duty and required edge performance. The listed steel grades are reference options, not interchangeable defaults.
Can you make non-standard sizes?
Yes, subject to a drawing, sample or complete measurements. Length, width, thickness, holes, spacing, edge direction and upper/lower position should be confirmed before production.
Why does the table show two Q11-4 × 2500 rows?
The supplied reference contains two different rows under that model label. They are kept separate rather than silently merged; send the old blade or drawing to identify the correct configuration.
What information is needed for a quotation?
Provide the machine model, cutting length, upper or lower position, old blade photos, drawing or dimensions, hole layout, material being cut, quantity and destination.
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Helpful information to send
- Machine model or product type
- Key dimensions or mounting details
- Material or application and quantity
- Photo, drawing or old-part image if available